DP Chemistry (last assessment 2024)
Question 19M.2.sl.TZ1.4b(iv)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.sl.TZ1.4b(iv) |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | b(iv) | Adapted from | N/A |
b(iv).
[Maximum mark: 1]
19M.2.sl.TZ1.4b(iv)
This question is about peroxides.
Hydrogen peroxide decomposes to water and oxygen when a catalyst such as potassium iodide, KI, is added.
2H2O2 (aq) O2 (g) + 2H2O (l)
(b(iv))
MnO2 is another possible catalyst for the reaction. State the IUPAC name for MnO2.
[1]
Markscheme
manganese(IV) oxide
OR
manganese dioxide [✔]
Note: Accept “manganese(IV) dioxide”.
Examiners report
Many could correctly name manganese(IV)oxide, but there were answers of magnesium(IV) oxide or manganese(II) oxide.
